Catkins and cones from a black alder tree (Alnus glutinosa). The male catkins (left),which are comprised of many flowers,produce pollen to pollinate female catkins. Once pollinated,the female catkins develop into woody false cones (right). In the autumn the scales of the cones open and disperse their seed | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gibbons, Bob |
Taille de l’image : | 5049 px × 3469 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |